HTML大文字化修飾名

HTML大文字化修飾名

[1] Stop defining nodeName in terms of tagName (annevk著, ) <https://github.com/whatwg/dom/commit/8e754b524b277b186503ed53d135b647b02d772b>

[2] Stop defining nodeName in terms of tagName · Issue #297 · whatwg/dom () <https://github.com/whatwg/dom/issues/297>